Sewer-pipe joint.



J. M, PHELAN.

SEWER PIPE JONT.

APPLICATION FILED SBPT11, 1909.

1 ,057,267, y Patented Mar. 25, 19.13.

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mi* im @327m @WZL -TED STATES PATET `@ilildll@til..

JGHN PHEI-JAN, OF JACKSON, MICHIGAN, ASSIGNB T vREI;IECGRCEI) CNCRETE IIIPE COMPANY, 0F JACKSON, MICHIGAN, A CORPQBATION OF WEST VIRGNUL.

SEWER-PIPE JOINT.

Specification of Letters Patent.

Application led September 1, 1909. Serial No. 515,604.

'4 which the following isla specification.

This invent-ion relates to an interlocking joint for concrete pipesl in which the pipe is, provided with an exterior joint upon 'the outside, said joint being formed by a smiannular groove which is filled with ceni'ent afterthe pipe sections are fitted together, and with a bottom joint formed upon the inside of the pipe.

ln the accompanying drawings: Figure 1 is a perspective view, partly section illustrating one of my joints. Fig. 2 is an end view of the pipe section.

In these'drawings 1 represents a section of concrete pipe, one end ofv which is provided with an annular, beveled recess 2, which recess leaves a projecting circumferential flange, th periphery of whichis a smooth continuation of the exterior surface of the pipe section. At the opposite end the pipe section is cut out as shown providing an inner flange 3, throughout'one half ofy its circumference, said cut out portion having a depth equal to the thickness of the extreme end of the flange above referred to, 4and this end of the pipeis also provided with a semia`nnular shoulder 4 which is coextensive with the flange 3 and the inner facevof which forrns a continuation of the interior wall of the pipe. The width of this shoulder is equal to the width of the ange 3, plus the width of the recess 2, and is beveled to tit into said recess.

ln laying the pipe the shoulder 4 is considered as the top of the pipe and when' thel sectionsare iitted together, there will be left a semi-annular groove running around the upper half of the pipe upon its outside and a similar groove running around one-half of the pipe in its lower or bottom portion, and accessible only from the inside. The advantages ofthis construct-ion are two-fold: The outer groove can be readily filled with cement from the outside, while the Ainner groove can be readily filled by a workman upon tle inside of the pipe.' it will be ohvious that with a complete exterior groove it would be difficult tQ` lill in the groove at the bottom of the pipe where the pipe rested directly upon the bottom of. a trench, and practicall impossible unless the trench was considera ly wider than the pipe.

A lfurther advantage of this invention lies in the fact that as the pipe sections are brought together, any obstruction or niate` rial which does not belong within the'pipe may be pushed therefrom through the lower pplrtion of the pipe before the sections are ally locked together, which would be ditiicult if the shoulder Il: extended entirely around the pipe. l have also shown a wire net work 5 which is in the form of a cylin der and which is embedded in the pipe, and

between this net-work and the interior et' the pipe run longitudinal metal bands 6 the ends of which are bent to forni hooks which hooks project from the ends of tinV pipe and engage semi-cylindrical bands e. which rest 4respectively in the outer and inner, upper and lower erooves.

Having thus fully described niv invention. what l claim as new and desire to secure by Letters Patent is A, concrete pipe sect-ion one end ot' which is provided with an annular, beveled recess thereby leaving a projecting circuiinlerenv tial flange, the periphery of which is a continuation of the exterior surface of the pipe section, the opposite end of said section be- -ing cut out throughout one-half of its circumference providing an inner senxrcircuinferential liange, said Harige being provided with a semi-annular shoulder co-ex tensive with the flange, the inner face of said shoulder' forming aontinuation of the interior wall of the pipe` section and said shoulder projecting beyond the lower half of the said pipe section, the shoulder of one pipe section being adapted to enter the recess of an adjacent section.

JOHN M. PHELAN. Witnesses:

WM. J. SAMnLs,

Pn'rnn B. Looms.

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